Research On Design Strategy Of Space In Cold Hall Based On Thermal Environment Optimization

Since the industrial revolution,the energy consumption of human beings for production and life has increased rapidly,and many developed countries have abused energy without restraint in order to develop their economy,which has not only caused great energy waste,but also made the earth’s environment suffer a heavy blow.of the building energy consumption,the energy consumption for heating and refrigeration accounts for about 50%～60%,while the heat loss caused by the improper design of the building enclosure structure in the heating and refrigeration part accounts for 20%～50% of the total energy consumption of the building.Cold winter in China is long and cold,the temperature difference between indoor and outdoor is great.Pressure forces us to pay a greater energy price for providing a comfortable thermal environment for buildings.A large number of research results show that the foyer space of the building is the weakest part of the building,and the change of outdoor climate will directly affect the foyer space of the building.Strong air convection will not only bring uncomfortable feelings,but also destroy the thermal comfort of the interior and aggravate the heat loss of the indoor space.Therefore,the energy-saving design strategy of building foyer space is one of the key links in building energy-saving design.Through reading a large number of literature,it is found that by adopting passive design strategies,such as changing the structure of the door,window or wall in the foyer space,it can effectively improve the thermal environment of the building hall space in the cold region,in order to explore the foyer space buffer cavity in the severe cold area.The feasibility and optimization strategy of the design method,this paper takes the apartment hall space of a university in Shenyang as the research object.The following four parts of research have been done:In the first part,the thermal environment of the hall space of high-rise student apartment was investigated by means of experimental testing,and then the physical model of the hall space was established by Airpak software and numerical simulation analysis of the hall space thermal environment was carried out.The feasibility of the software as a research tool in this paper was verified by comparing with experimental data.By analyzing the thermal environment of the inner and outer doors of the foyer space and the 45°opening of the inner and outer doors of the doorway,it is concluded that the doorway and the south side of the doorway are the important links to improve the thermal environment of the foyer space.The second part analyzes the barrier effect of the arrangement of the door bucket at the entrance of the door bucket on the cold wind,which are the outer door bucket,the inner door bucket and the comprehensive door bucket.Determined that the layout of the integrated door bucket is the best for blocking cold air.And the hovel C shape,L and reverse s-shaped three inside and outside the gate location relationship between the transient numerical simulation analysis,it is concluded that C shape inside and outside the door position cross-bars decorate a form of synthesis is to promote hallway buffer action of the internal thermal environment is the most effective.The third part of the Trombe wall system is established by using Airpak software physical model,analyses the air layer width,vent area ratio between two factors influence on Trombe wall thermal characteristics,finally it is concluded that when the Trombe wall system of air between the layer thickness is 200 mm,vent area of 1.5%,the Trombe wall system the best thermal performance.In the fourth part,combined with the optimal design strategy of the door bucket and the design strategy of the Trombe wall,Airpak software was applied to analyze the improvement effect of the layout strategy of the door bucket and Trombe wall on the thermal environment of the hall space.Finally,it was concluded that the optimal design strategy proposed in this paper can reduce the heat supply in the hall space,which has the purpose of saving energy and reducing consumption.